4-Blackfriars Bridge Foreshore
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We need a work site to connect the local combined sewer overfow (CSO), known as the Fleet Main and the northern Low Level Number 1 Sewer, to the main tunnel o the proposed Thames Tunnel project. We are currently proposing to use the nor thern oresho re upstream o Black riars Bridge or this construction work and to accommodate the permanent structures required to operate the tunnel. B l a c k f r i a r s B r i d g e F o r e s h o r e At present, the combined sewer overows along the River Thames discharge untreated sewage directly into the river. This occurs because London’s mainly Victorian sewerage system, which was designed to transport both wastewater (sewage) and storm water (rainall), is at or near capacity. Some CSOs discharge untreated sewage into the River Thames on average more than once a week and ater only 2mm o rainall. This situation is likely to become worse in the uture, due to population growth and increased urbanisation. The discharge o untreated sewage into the River Thames is harmul to the environment. It reduces river water quality, harms the aquatic lie , causes unsightly litter and increases the risks to health or users o the River Thames. Starting in west London and broadly ollowing the path o the River Thames through the centre o the capital, the Thames Tunnel would transer the ows rom the most polluting CSOs to Beckton Sewage Treatment Works in the east o the city. The need or construction sites We need a signifcant number o sites in order to construct the Thames Tunnel project. Large ‘shat sites’ are required at certain points along the route to allow the construction o the main tunnel. Smaller ‘CSO sites’ are also required near each o the most polluting CSOs to connect them to the main tunnel. We have carried out a detailed site selection process to identiy suitable sites or the construction o the main tunnel and connection o the CSOs. For more inormation, see our Project Inormation Paper Construction Sites. Throughout this process, we have used our pro essional judgement to compare and careully balance the merits and potential impacts o using a particular shat or CSO site. This has enabled us to identiy our pre erred sites along the route required or the construction and operation o the main tunnel and the connection o each o the CSOs. Thames T unnel Blackfriars Bridge Foreshore
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Transcript of 4-Blackfriars Bridge Foreshore
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How we chose this preerred siteThe signifcant constraints o the surroundingheavily built-up area, including the road and railnetwork, meant that only one possible work sitewas identifed to connect to the Fleet Main CSOwhich is located directly under Blackriars roadbridge. The site is located in the river oreshore,west o Blackriars Bridge. The site was assessed orits suitability by taking into account engineering,planning, environment, property and community
considerations.
Our preerred site:Blackriars Bridge Foreshore
We have identifed a site on the oreshore, close towhere the CSO discharges under Blackriars Bridge,as the only possible location rom which we canintercept the Fleet Main CSO. The preerred sitepresents a number o engineering challenges as it issituated close to Blackriars road and rail bridges, theDistrict Line, the Waterloo & City line tube tunnels,the EDF Bankside cable tunnel, red route A3211
Victoria Embankment and Blackriars underpass.We will careully consider how this site could beutilised and what mitigation would be requiredto minimise disruption to the surrounding area,including the use o Blackriars Pier, plus impactson the oreshore, river bed, river wall and navigationin this busy and narrow section o the river.
Preerred site at Blackriars Bridge Foreshore – showing use during construction
Ordnance Survey Licence number 100019345. © Crown Copyright 2009. All rights reserved.
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For urther project inormation see our website:
www.thamestunnelconsultation.co.ukor call us on 0845 366 2950
Permanent use o the siteWe are likely to require some above-ground structureson this site ater the construction work has fnished.In order to build these structures, we proposeextending the existing river wall out into the RiverThames to create a new area o hard-standing.
We would need a ventilation column (approximately15m high and 3m diameter) and a building(approximately 10m high, 12m wide and 20m long)to provide ventilation and fltering o the air in thetunnels (see image above).
We would leave the area around these structures ashard-standing to allow maintenance vehicles andpublic pedestrian access to this new area o riverrontage.
Above is an example o how the site could lookater construction has fnished. As part o our publicconsultation we would like to know your views on thepermanent look and use o the site.
Blackriars Bridge Foreshore – illustrative visualisation o completed project
Ordnance Survey Licence number 100019345. © Crown Copyright 2009. All rights reserved.
